. >> pope benedict xvi made what is expected to be his final public appearance today before some 150,000 people in st. petter's square. the 85-year-old pope talked about the choppy waters during his papacy as well as the joys. he thanked people for respecting his decision to retire, which takes effect tomorrow. >>> in new zealand, a tv helicopter caught pictures of what is believed to be the same shark that killed a swimmer. the victim is identified as a 46-year-old man, adam strange. police raced out in boats. they don't know if they killed the shark. surfers say it's likely a great white. >>> and in the tiny african kingdom, britain's harry danced for children. the students also taught him some sign language. it is located within south africa. it has one of the highest rates of hiv/a.i.d.s. in the world. >>> this is a bittersweet night here at ktvu as we say goodbye to reporter rita williams, who is retiring after 35 years here at the station. we're happy for rita, but boy are we going to miss her presence in our newsroom. rita is a top notched journalist, and very accomplished storyte